C++ program to demonstrate binary operator overloading

#include <iostream>
using namespace std;
class Box
{
double length;
double breath;
double height;
public:
double getvolume()
{
return length*breath*height;
}
void setLength(double len)
{
length=len;
}
void setBreath(double br)
{
breath=br;
}
void setHeight(double h)
{
height=h;
}
Box operator+(Box b)
{
Box box;
box.length=this->length+b.length;
box.breath=this->breath+b.breath;
box.height=this->height+b.height;
return box;
}
};
int main()
{
Box box1;
Box box2;
Box box3;
double volume=0.0;

box1.setLength(6.0);
box1.setBreath(7.0);
box1.setHeight(5.0);

box2.setLength(12.0);
box2.setBreath(13.0);
box2.setHeight(10.0);

volume=box1.getvolume();
cout<<"Volume of box 1 is "<<volume<<endl;

volume=box2.getvolume();
cout<<"Volume of box 2 is "<<volume<<endl;

box3=box1+box2;

volume=box3.getvolume();
cout<<"Volume of box 3 is "<<volume<<endl;

return 0;
}